diff --git a/sdk/include/ViGEm/km/BusShared.h b/sdk/include/ViGEm/km/BusShared.h
index bf62d7f..88662f3 100644
--- a/sdk/include/ViGEm/km/BusShared.h
+++ b/sdk/include/ViGEm/km/BusShared.h
@@ -62,6 +62,7 @@ DEFINE_GUID(GUID_DEVINTERFACE_BUSENUM_VIGEM,
 #define IOCTL_VIGEM_PLUGIN_TARGET       BUSENUM_W_IOCTL (IOCTL_VIGEM_BASE + 0x000)
 #define IOCTL_VIGEM_UNPLUG_TARGET       BUSENUM_W_IOCTL (IOCTL_VIGEM_BASE + 0x001)
 #define IOCTL_VIGEM_CHECK_VERSION       BUSENUM_W_IOCTL (IOCTL_VIGEM_BASE + 0x002)
+#define IOCTL_VIGEM_WAIT_DEVICE_READY   BUSENUM_W_IOCTL (IOCTL_VIGEM_BASE + 0x003)
 
 #define IOCTL_XUSB_REQUEST_NOTIFICATION BUSENUM_RW_IOCTL(IOCTL_VIGEM_BASE + 0x200)
 #define IOCTL_XUSB_SUBMIT_REPORT        BUSENUM_W_IOCTL (IOCTL_VIGEM_BASE + 0x201)
@@ -184,6 +185,29 @@ VOID FORCEINLINE VIGEM_CHECK_VERSION_INIT(
     CheckVersion->Version = Version;
 }
 
+#pragma endregion
+
+#pragma region Wait device ready
+
+typedef struct _VIGEM_WAIT_DEVICE_READY
+{
+    IN ULONG Size;
+
+    IN ULONG SerialNo;
+
+} VIGEM_WAIT_DEVICE_READY, * PVIGEM_WAIT_DEVICE_READY;
+
+VOID FORCEINLINE VIGEM_WAIT_DEVICE_READY_INIT(
+    _Out_ PVIGEM_WAIT_DEVICE_READY WaitReady,
+    _In_ ULONG SerialNo
+)
+{
+    RtlZeroMemory(WaitReady, sizeof(VIGEM_WAIT_DEVICE_READY));
+
+    WaitReady->Size = sizeof(VIGEM_WAIT_DEVICE_READY);
+    WaitReady->SerialNo = SerialNo;
+}
+
 #pragma endregion 
 
 #pragma region XUSB (aka Xbox 360 device) section